<html>
<head>
    <title>Please Sign In</title>
</head>
<body>
    {% if message %}
    <p style="color:red">{{ message}}</p>
    {% endif %}
    <form action="/signin" method="post">
        <legend>Please sign in:</legend>
        <p><input name="username"></p>
        <p><input name="password", type="password"></p>
        <p><button type="submit">Sign In</button></p>
    </form>
</body>